XML External Entity (XXE) Injection

Affecting expat package, versions <2.2.7-r0

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Overview

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

References

CVSS Score

7.5
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE
CVE-2018-20843
CWE
CWE-611
Snyk ID
SNYK-ALPINE39-EXPAT-453353
Disclosed
24 Jun, 2019
Published
24 Jun, 2019